Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!mcsun!unido!mikros!mwtech!martin
From: martin@mwtech.UUCP (Martin Weitzel)
Newsgroups: comp.unix.admin
Subject: Re: user owns login tty
Message-ID: <985@mwtech.UUCP>
Date: 3 Dec 90 09:27:53 GMT
References: <1174@aut.autelca.ascom.ch>
Reply-To: martin@mwtech.UUCP (Martin Weitzel)
Organization: MIKROS Systemware, Darmstadt/W-Germany
Lines: 15

In article <1174@aut.autelca.ascom.ch> dhuber@aut.autelca.ascom.ch (Daniel Huber) writes:
>Whenever somebody logs in on the system console he owns the device
>/dev/console.
>He can do everything with it. Even delete it.

Not true (at least on every flavour of UNIX I know, which includes
V7 + SYS-III derived XENIX and several SYS-V derived systems).

To delete a file you need *not* to be owner of this file but you need
write access to the directory which holds the entry. So, if the user
owns /dev/console, he still can not delete it; if deleting /dev/console
is possible on your system, check the permissions of the /dev-directory.
There should be *no* write access for regular users.
-- 
Martin Weitzel, email: martin@mwtech.UUCP, voice: 49-(0)6151-6 56 83